package com.mobilesales.android.database;

import java.io.File;
import java.io.FileOutputStream;
import java.io.IOException;
import java.io.InputStream;
import java.io.OutputStream;

import android.content.Context;
import android.database.SQLException;
import android.database.sqlite.SQLiteDatabase;
import android.database.sqlite.SQLiteOpenHelper;
import android.util.Log;

public class DatabaseHelper extends SQLiteOpenHelper {

	private static String DB_PATH = "/data/data/com.mobilesales.android/databases/";
	private static String DB_NAME = "MobileSales.db";
	private SQLiteDatabase myDataBase;
	private final Context myContext;

	public DatabaseHelper(Context context) {
		super(context, DB_NAME, null, 1);
		this.myContext = context;
	}

	private void copyDatabase() throws IOException {

		this.getReadableDatabase();
		InputStream myInput = myContext.getAssets().open(DB_NAME);
		String outFileName = DB_PATH + DB_NAME;
		OutputStream myOutput = new FileOutputStream(outFileName);

		byte[] buffer = new byte[1024];
		int length;
		while ((length = myInput.read(buffer)) > 0) {
			myOutput.write(buffer, 0, length);
		}

		myOutput.flush();
		myOutput.close();
		myInput.close();
	}

	public void openDatabase() throws SQLException {
		String myPath = DB_PATH + DB_NAME;
		
		File dbFile = new File(myPath);
		if (!dbFile.exists()) {
			try {
				copyDatabase();
			}
			catch(IOException ex) {
				Log.e("DatabaseHelper", ex.getMessage(), ex);
			}
		}
		myDataBase = SQLiteDatabase.openDatabase(myPath, null,
				SQLiteDatabase.OPEN_READWRITE);
	}

	public SQLiteDatabase getDatabase() {
		if (myDataBase == null)
			openDatabase();
		return myDataBase;
	}

	@Override
	public synchronized void close() {
		if (myDataBase != null)
			myDataBase.close();

		super.close();
	}

	@Override
	public void onCreate(SQLiteDatabase db) {

	}

	@Override
	public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {

	}

}
